[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Qemu-devel] [PATCH] hw/arm/virt-acpi - reserve ECAM space as PNP0C02 de

From: Ard Biesheuvel
Subject: [Qemu-devel] [PATCH] hw/arm/virt-acpi - reserve ECAM space as PNP0C02 device
Date: Fri, 13 Jan 2017 16:36:18 +0000

Linux for arm64 v4.10 and later will complain if the ECAM config space is
not reserved in the ACPI namespace:

  acpi PNP0A08:00: [Firmware Bug]: ECAM area [mem 0x3f000000-0x3fffffff] not 
reserved in ACPI namespace

The rationale is that OSes that don't consume the MCFG table should still
be able to infer that the PCI config space MMIO region is occupied.

So update the ACPI table generation routine to add this reservation.

Signed-off-by: Ard Biesheuvel <address@hidden>
 hw/arm/virt-acpi-build.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index 085a61117378..e8769dc6288f 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -310,6 +310,12 @@ static void acpi_dsdt_add_pci(Aml *scope, const 
MemMapEntry *memmap,
     Aml *dev_rp0 = aml_device("%s", "RP0");
     aml_append(dev_rp0, aml_name_decl("_ADR", aml_int(0)));
     aml_append(dev, dev_rp0);
+    Aml *dev_res0 = aml_device("%s", "RES0");
+    crs = aml_resource_template();
+    aml_append(crs, aml_memory32_fixed(base_ecam, size_ecam, AML_READ_WRITE));
+    aml_append(dev_res0, aml_name_decl("_CRS", crs));
+    aml_append(dev, dev_res0);
     aml_append(scope, dev);

reply via email to

[Prev in Thread] Current Thread [Next in Thread]